refer to the lincolnville school district bus data. information provided by manufac-turers of school buses suggests the mean maintenance cost per year is $4,400 per bus with a standard deviation of $1,000. compute the mean maintenance cost for the lin-colnville buses. does the lincolnville data seem to be in line with that reported by the manufacturer? specifically, what is the probability of lincolnville’s mean annual mainte-nance cost, or greater, given the manufacturer’s data?